Dissolved Oxygen Meter Dissolved Oxygen Range 0 to 20.0 mg/L Oxygen Concentration 0 to 19.9 mg/L Waterproof No Automatic Temperature Compensation Yes Displayed Temperature Range 0 to 50 Degrees C 32 to 122 Degrees F Operating Temp Range (F) 32 Degrees to 122 Degrees Display LCD Calibration 1 point Cable Length 4 m Includes (1) 9V Battery 3 Membranes Case Meter Probe with 4m Cable Rubber Holster